function [loadVectorGradAlpha] = assemblyLoadVectorGradAlpha ( partialPx , partialPy , ...
                                                                    partialAx , partialAy , alpha)

loadVectorGradAlpha (:,1) = partialPx - partialAx * alpha';
loadVectorGradAlpha (:,2) = partialPy - partialAy * alpha';

end